7Florence, Italy
As the birthplace of the Renaissance, Florence is home to some of the world’s most famous art and architecture, including the Uffizi Gallery and the Florence Cathedral. However, the city’s small historic center is overwhelmed with tourists, especially during the summer months. Narrow streets are packed with visitors, and locals are finding it increasingly difficult to go about their daily lives due to the influx. Many residents have moved out of the city center, and Florence is now focused on promoting sustainable tourism practices, such as encouraging off-season travel and limiting visitor numbers at key attractions.